Here are a few pics of the latest developments:
I’ve drawn up a rough plan of the internal workings of the triggers and the barrel lock. Now I can proceed with the grip, lock and stock. Sorry about the lousy photo.
Ive sourced the 38mm tube and shaped the joint surfaces for the barrels. Perfect fit.
Very large bore barrels = 30mm bullets!
Once I get some WeldOn 16 or Acryfix 192, I can join them and start building the stock fittings around the barrels.
A shot of my polystyrene sketch model for proportion and ergonomics, it’s ugly but it works.